Varactor-tunable frequency selective surface with resistive-lumped-element biasing grids

Mias, C.

doi:10.1109/lmwc.2005.855372

Cited by 83 publications

(28 citation statements)

References 7 publications

(8 reference statements)

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“…In [15], the change in capacitance of the diodes in the y-axis is through voltage in the resistors in the same y-axis. In both cases, the voltage drop caused by the very small current flowing across the diodes can be neglected, especially when the array size is not large [15][16][17]. Fig.2 shows the simulated transmission response for the two designs.…”

Section: Simplified Dual Polarized Active Fssmentioning

confidence: 99%

An application of active frequency selective surface to reconfigurable antenna technology

Sanz-Izquierdo

Liang

Parker

et al. 2016

Active and Passive RF Devices Seminar

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Abstract-This paper illustrates the use of active frequency selective surfaces (FSS) in reconfigurable antennas. A patch-form dual-polarized tunable FSS is adapted for use as an active artificial magnetic conductor (AMC). As with the tunable FSS, the active AMC offers independent tuning capability of the reflection phases for two polarisations of incident EM waves. By combining the AMC with a wideband coplanar waveguide fed monopole antenna, circularly polarisation (CP) capability is realized at any frequency over the 1.15-1.60GHz band. Furthermore, the CP state can be switched between left hand CP and right hand CP, by simply interchanging the capacitances of varactors controlling the reflection phases of the two orthogonal polarised waves. The antenna covers the frequency bands of all operational and in-preparation satellite navigation systems, including GPS, GLONASS, Beidou and Galileo. polarization reconfigurable circular polarized (CP) antenna using active artificial ground (AG) structure Index Terms-CP antenna, frequency tunable, polarization switchable, active aritificial ground, satellite navigation.

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Section: Simplified Dual Polarized Active Fssmentioning

confidence: 99%

An application of active frequency selective surface to reconfigurable antenna technology

Sanz-Izquierdo

Liang

Parker

et al. 2016

Active and Passive RF Devices Seminar

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“…In the past, different techniques have been explored for designing tunable periodic structures. By far, the most widely used technique for making tunable periodic structures is to integrate electronically tunable elements such as solid state or MEMS varactor with the unit cell of the periodic structure [7]. This technique, however, is rather challenging to implement in a physically large periodic structure with sub-wavelength constituting elements.…”

Section: Introductionmentioning

confidence: 99%

Large-scale fluidic tuning of sub-wavelength periodic structures

Bhattacharjee

Jiang

Behdad

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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In this paper, we present a technique to fluidically tune the response of periodic structures composed of subwavelength constituting unit cells. This technique is applied to a two-dimensional periodic structure with multiple unit cells and the response of the structure is continuously tuned over a broad frequency band. The technique is based on embedding metal and glass balls inside several parallel channels within the dielectric substrate which supports the periodic structure. In each channel, a periodic arrangement of metal and glass balls is assembled and is allowed to move freely within the channel. By moving this periodic train of balls over small distances with respect to the fixed periodic structure, the response of the structure is continuously tuned. 3D printing technology is used to implement the dielectric substrate with embedded fluidic channels. The structure is designed to ensure that the movement of balls in all channels can be synchronized. A prototype with 8 parallel channels accommodating 9 unit cells in each channel is fabricated using a Viper Si2 3D printer and synchronization movement of the balls is verified experimentally when the balls in channels are embedded in mineral oil and pressure driven. Then a prototype with 16 channels is designed to experimentally verify the synchronous movement of balls and the tuning range achievable from the prototype.

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“…Recently, the development of tunable FSS functionality by integrating microfluidic technology [2] has become increasingly attractive for a range of applications including quasi-optical microwave components for antennas [3]. Parallel to these developments, FSSs also provide a suitable platform for microwave and THz sensing [4][5].…”

Section: Introductionmentioning

confidence: 99%

Integration of microfluidic channels with frequency selective surfaces for sensing and tuning

Pavuluri

Mateo-Segura

McKeever

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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A two dimensional perturbed Frequency Selective Surface (FSS) with enhanced near-fields has been used for microwave sensing applications. The perturbation causes the scattering by the perturbed array, within a frequency range to be dominated by an odd mode which gives rise to a sharp resonance with a seven-fold near field enhancement compared to the unperturbed array. The spectral shift of the odd resonance is studied for small variations of the electric permittivity of the supporting substrates. The aperture FSS is shown theoretically to increase the sensor sensitivity. The FSS is integrated with a microfluidic channel inside a waveguide simulator to ease the fabrication process and the performance of the ensemble is investigated for different samples inside the channel.

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Varactor-tunable frequency selective surface with resistive-lumped-element biasing grids

Cited by 83 publications

References 7 publications

An application of active frequency selective surface to reconfigurable antenna technology

An application of active frequency selective surface to reconfigurable antenna technology

Large-scale fluidic tuning of sub-wavelength periodic structures

Integration of microfluidic channels with frequency selective surfaces for sensing and tuning

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